Lubricating apparatus



March 6, 19289 1,661,755

B. F. HUBBELL LUBRICATING APPARATUS Filed March 14. 1922 Fig.6. I Fig.-?.Fry.8. Eg s.

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Patented Mar. 6, 1928 BENJAMIN F. HUBBELL, OF CAMBRIDGE, MASSACHUSETTS, ASSIG-NUR, BY MESNE AS- ?SIGNMENTS, TO THE BASSICK MANUFACTURING COMPANY, U1 CHZCAGO, ILLINQIE,

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LUBRICA'IKNG APPARATUS.

Application riled March M, 1922. Serial No. 543,555.

This invention pertains to improvements in lubricating apparatus. lt is among the objects of the invention to provide a source of lubricant under pressure which may be conveniently attached to and detached from a lubricant-receiving part.

ln the drawings, which show a preferred form of one embodiment of my invention Figure 1 is a side elevation of a preferred form ot-grease gun coupled to a greasercceiving nipple;

Fig. 2 is a longitudinal central sect on through the gun illustrated in Fig. 1, bemg partly in elevation;

Fig. 3 is a side elevation of the nozzle portion of the apparatus illustrated in Figs. l. and 2, being partly broken away to show the grease-receiving nipple entered therein, but prior to completion of the coupling operation;

Fig. 4 is an end elevation of the discharge end of the apparatus; a

Fig. 5' ,is a view similar to l 1g. 3, but showing the relation of the parts at the completion of the coupling operation;

Fig. 6 illustrates the preferred term of sealing part shown in section in Fig. 2, showin threeviews, these being respectively left en l elevation, side elevation and right end elevation r Fig. 7 illustrates a preferred form of one of the sealing washers illustrated in Fig. 2; Fig. 8 is a rear elevation of that portion of the valve mechanism illustrated in Fig.

2 which is rotated relative to the greaserec'eiving part during the valve openlng operation;

Fig. 9 shows an end elevation and longitudinal section(partly in elevation) of a preferred form of grease-receiving nipple illustrated in Figs. 1 through l;

Figs. 10' and 11 are d1agrammat1c views illustrating the relative position of the various cooperating parts lying at the left of the line 10--10 on Fig. 2, the views showing the relative position of the parts both prior and subsequent 'to the coupling and valve opening operations;-and

' Fig. 12 is a view showing the parts in the relative position shown in Fig. 5, the section taken diagonally of the nipple.

Referring to the drawings and to the preferred form of my invention selected for *illustrative purposes, I have shown a lubricant-expelling device including a barrel l2, and a plunger 13 adapted to be actuated therein to expel lubricant in the usual manner by rotation of the screw-threaded stem 14. The discharge end of the preferred form of my invention illustrated includes a nozzle or end piece l5 apertured at one end to receive a head of a lubricant-receiving nipple 16 which may be of any desired shape, but which is preferably enlarged at 17 to provide extended lateral faces and underlying surfaces beneath which flanged portions on the nozzle 15 may engage when the nipple is entered in the nozzle and the nozzle is turned relative thereto. Upera tively enclosed within the nozzle 15, I have provided a sealing part 18 adapted to be moved axially of the nozzle during the coupling and uncoupling operation so that when the nipple 16 is entered in the nozzle 15 a clearance may beprovided, this clearones being taken up, pursuant to the coupling operation, by rotation of the nozzle 15 relative to the lubricant-receiving nipple and relative to the sealing part 18, which is held by the grease-receiving nipple against rotation or turning movement with the nozzle 15. The sealing part 18 may conveniently carry a sealing disc or washer 19 apertured to permit passage of lubricant therethrough, and the rotation between the sealing part 18 and cooperating portions of the mechanism, herein shown as the valve disc 20, may conveniently be used to provide a valve for permitting the discharge of lubricant pursuant to the coupling operation and preventing the discharge of lubricant when the nipple is not con led to the nozzle. In the preferred term 0 apparatus illustrated, the nozzle 15 is chambered internally to provide flanges 21 adapted to underlie the projections 1? on the lubricant-receiving nipple when, coupled, and inclined means operatively engaged with the sealin part 18, this inclined means being typified y the female thread 22 in the nozzle into which the male thread 23 of the sealing part enters. The thread is preferably so proportioned and of such pitch that when the nipple is entered in the nozzle, the underlying face of the projection 1? will considerably overlie the flange 21, thus providing ample clearance to permit easy assing of the projecting portions of the n'ipp e over lid dill

the flanges on the nozzle, and so that as the nozzle is turned relative to the nip le the sealin part 18 cannot turn relative t ereto, being eld by engagement of the pro'ections 24 and (Fig. 6) over the lateral aces of the enlarged portion of the nipple. The sealing part 18 being held against rotation and being threaded or otherwise engaged by inclined means to the nozzle 15 will be moved toward the end of the nipple (or the flanges on the end of the nozzle will be drawn rearwardly toward the under side of the projection 17 on the nipple) thus taking up the clearance and pressing the sealing part, with interposed sealing washer 19,

. against the lubricant-receiving end 26 of determined by the pitch 0 ressure being the inclined means and by the torque on the nozzle 15, the latter torque in the form of my invention illustrated being the same as the torque on the barrel of the lubricant-expelling device.

To provide for registration of the projections 24 and 25 with the lateral faces of the opening in the end of the nozzle 15 so as to permit ready entrance and removal of the nipple relative to the nozzle of the apparatus, I have provided stop means herein typified by the screw or pin 27 carried by the sealing part 18 and cooperating with a sto surface typified by the end 28 of a slot in ,the nozzle. The extent of relative rotation between the nozzle 15 and sealing part 18 is therefore determined in one direction, herein shown as the right hand direction, by the ressure of the sealing part on the end of t e nipple, this pressure being opposed by the flanges on the nozzle underlylng the projections on the nipple. On the other hand, when the parts are rotated in the left hand direction, the extent of rotation or turning movement between the nozzle 15 and the sealing part 18 is limited by the engagement of the projection 27 with the end 28 of the slot in the nozzle in which position no portion of the projection 17 on the nipple will overlie the anges 21 of the nozzle, thus permitting ready withdrawal of the nozzle from the nipple.

The preferred form of valve illustrated is of the rotary type, ports 30, 31 in the rotatable valve part 20 registering with passages in the sealing part 18 pursuant to the coupling operation. In practice, I have found that the point at which an adequate seal between the sealing part and the nipple is reached will not vary sutiiciently to cause nonregistration of the valve parts, but I may provide for variations in thickness of the sealingl disc by elongation of the apertures in t e valve disc. It will be understood that the valve part 20 reciprocates axially of the apparatus as the sealing part 18 reeiprocates, always remaining in close the nipple, the extent of fixed relative to the nozzle 15 permitting the smooth rear end of the sealing part 18 to be reciprocated therethrough durlng the coupling and uncoupling operations.

\Vhile I have shown and described a preferred form of one embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode of operation, may be made without departing from the scope of my invention, which is best defined in the following claims.

I claim:

1. Lubricating apparatus comprising, in combination, a lubricant-receiving nipple and a lubricant-expelling device having a coupling at its discharge end, said coupling axially receiving said nipple while providing axial clearance prior to completion of the coupling operation, a gasket and means held against rotation relative to said nipple during the coupling operation for taking up said clearance by positively moving said gasket toward said nipple thereby providing a tight joint with the lubricant-receiving end of said nipple.

2. Lubricating apparatus comprising, in

combination, a lubricant-receiving nipple presenting a polygonal portion and a lubricant-expelling device having a coupling at its discharge end, said coupling having polygonally apertured means to receive and retain said polygonal portion and providing axial clearance prior to completion of the coupling operation, and screw-operated means for taking up said clearance and providing a tight joint with the lubricant-receiving end of said nipple. 3. Lubricating apparatus comprising, in combination, a lubricant-receiving nipple presenting a polygonal portion and a lubricant-expelling device having a coupling at its discharge end, said coupling having polygonally apertured means to receive and retain said polygonal portion and providing axial clearance prior to completion of the coupling operation, and inclined plane operated meansjor taking up said clearance and providing a tight joint with the lubricant-receiving end of said nipple.

4. Lubricating a paratus comprising, in combination, a In ricant-receiving nipple presenting a polygonal portion and a lubricant-expelling device having a coupling at llu to, said discharge end providing an opening at its end to admit an end of said nipple including said lateral projections, said dischar e end also providing adjacent said opening flange portions toengage beneath said lateral projections when said discharge end is turned relative to said nipple and also providing an interior movable part and inclined means for moving said interior movable art towardsaid nipple to provide a sealed joint therewith when coupled and horn said nipple to provide clearance for entrance and removal of said nipple when not coupled.

6. In a pressure lubricatin system, a hip ple having a lubricant-receiving aperture at one end thereof and lateral projections, and a lubricant-expelling gun having a coupling at its discharge end for engagement with said nipple, and providing a sealing part non-rotative relative to said nipple, and inclined mpans actuated by turning of said till lubricant-expelling gun for pressing together said sea-ling part and said nipple to prevent leakage therebetween.

7,. in a pressure lubricating system, a nipplehaving a lubricant-receiving aperture at one end thereof and lateral projections, and a lubricant-expelling gun having a coupling at its discharge end for engagement with said nipple and providing a sealing part non-rotative relative to said nipple, inclined means actuated by turning of said grease gun for pressing together said sealing part and said nipple to prevent leakage thorebetween and a screw-threaded stein for actuating expulsion of lubricant lrom said gun by turning movement in the same direction which actuates pressing together of said sealing part and said nipple by said inclined means.

8. Lubricating apparatus comprising, in combination, a nipple having a lubricant receiving aperture at one end. and providing lateral projections, and a lubricant-expel ling gun having a nozzle presenting nip leengaging portions 21, a reciprocable sea ing part 18 and inclined means independent of said nipple-engaging portions for causing reciprocation at said sealing part 18 relative to said nipple-engaging portions 21 during engagement and disengagement of the nozzle with the nipple.

9. Lubricating apparatus comprising, in combination, a nipple having a lubricantreceiving aperture at one end and providing lateral projections, and a lubricant-expelling g'un having a nozzle presenting nipple-engaging portions v21, a reciprocable sealing part 18 and inclined means independent of said nipple-engaging portions for causing reciprocation of said sealing part 18 relative to said nipple-engaging portions 21'during engagement and disengagement of thenozzle with the nipple, said sealing part 18 apertured to permit passage of lubricant therethrough and cooperating with a valve part to control passage of lubricant therethrough.

10. In a pressure lubricating system, a lubricantreceiving nipple, and a source of lubricant under pressure having means for coupling thereof to said nipple by rotative movement to form a seal,a valve operatively interposed inthe path of said lubricant adjacent said coupling and presenting parts providing apertures broughtinto and out of alignment by relative rotation, at least one of said apertures enlarged to compensate for variation in the extent of rotation therebetween during the coupling operation.

ll. Lubricating apparatus including a nozzle having means for receiving and retaining a lubricant-receiving nipple, sealing means housed inside said nozzle and engaging said nipple when inserted to prevent rotation of said sealing means relative to said nipple, said sealing means being actuated by rotation of said nozzle relative to said nipple to move forward against said nipple and form a seal, and ported valve means axially slidable in said nozzle but rotating therewith, said valve means abutting said sealing member and said sealing niember'having ports positioned to register with said valve ports only after said seal has been formed.

12. Lubricating apparatus including a nozzle having means for receiving and retaining a lubricant-receiving nipple, and sealing means housed inside said nozzle and engag ing said nipple when inserted to prevent a tation of said sealing means relative to said nipple, said sealing means being actuated by rotation of said nozzle relative to said nipple to move forward against said nipple and form a seal, and valve means in said nozzle positioned to open onlyafter said seal has been formed.

13. Lubricating apparatus including a nozzle having means for receiving a lubricantreceiving nipple, and sealing means housed inside said nozzle and engaging said nipple when inserted to prevent rotation of said sealing means relative to said nipple, said sealing means being actuated by rotation ot lie said nozzle relative to said nipple to move forward against said nipple and form a seal.

14. Lubricating apparatus including a nozzle having means for receiving a lubricantreceiving nipple and sealing means housed inside said nozzle and actuated by rotation of said nozzle relative to said nipple to move forward against said nipple and .form a seal.

15. Lubricating apparatus including a nozzle having means for receiving a lubricantreceiving nipple, and sealing means actuated by rotation of said nozzle relative to said nipple to move forward against said nipple and form a seal.

16. Lubricating apparatus comprising a gun, a discharge nozzle receiving lubricant from said gun, sealing and clamping means operated by relative rotary and axial movement of parts carried by said nozzle to clamp a receiving nipple and form a seal therewith, and a single handle part for operating said sealing and clamping means.

17. Lubricating apparatus comprising a an, a discharge nozzle receiving lubricant rom said gun, sealing and clamping means operated by relative rotary and axial movement of parts carried by said nozzle to clamp a receiving nipple and form a seal therewith, means for operating said sealing and clamping means by rotation of said nozzle about its own axis, a valve in said nozzle, and means for opening and closing said valve by rotation of said nozzle.

18. Lubricating apparatus including a lubricant expelling gun for engagement with a lubricant-receiving nipple directly and rigidly carrying a generally aligned nozzle presentin a valved coupling including a reciprocaEle sealing part and a deferred action rotary valve reciprocable with said sealing part during the coupling and uncoupling operations.

In testimnoy whereof, I have signed my name to this eggfification.

B JAMIN F: HUBBELL. 

